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An encapsulated helical one-dimensional cobalt iodide nanostructure

Abstract

Single-walled carbon nanotubes (SWNTs) can be used as templates for the growth of low-dimensional inorganic materials whose structures and properties often differ greatly from those of the bulk1. Here we describe the detailed crystallography of an entire helical one-dimensional cobalt diiodide nanostructure encapsulated within a SWNT. This material has an unprecedented twisted double tetrahedral chain structure arising from a rotation of Co2I4 units along its length. The complete nanostructure comprises two distinct regions with oppositely handed helices separated by a short disordered region. The encapsulating SWNT shows a commensurate ovoid distortion reflecting an unexpectedly strong interaction between the nanostructure and the SWNT.

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Figure 1: Detailed structure of the encapsulated CoI2 nanostructure.
Figure 2: Overall helical structure of the encapsulated CoI2 nanostructure.
Figure 3: End-on views of a space-filling model with atoms represented by spheres according to their size.

References

  1. 1

    Sloan, J., Kirkland, A.I., Hutchison, J.L. & Green, M.L.H. Integral atomic layer architectures of 1D crystals inserted into single walled carbon nanotubes. Chem. Commun. 13, 1319–1332 (2002).

    Article  Google Scholar 

  2. 2

    Ajayan, P.M. & Iijima, S. Capillarity-induced filling of carbon nanotubes. Nature 361, 333–334 (1993).

    CAS  Article  Google Scholar 

  3. 3

    Sloan, J. et al. Capillarity and silver nanowire formation observed in single walled carbon nanotubes. Chem. Commun. 8, 699–700 (1999).

    Article  Google Scholar 

  4. 4

    Meyer, R. et al. Discrete atom imaging of one dimensional crystals formed within single walled carbon nanotubes. Science 289, 1324–1326 (2000).

    CAS  Article  Google Scholar 

  5. 5

    Sloan, J. et al. Two layer 4:4 co-ordinated KI crystals grown within single walled carbon nanotubes. Chem. Phys. Lett. 329, 61–65 (2000).

    CAS  Article  Google Scholar 

  6. 6

    Wilson, M. & Madden, P.A. Growth of ionic crystals in carbon nanotubes. J. Am. Chem. Soc. 123, 2101–2102 (2001).

    CAS  Article  Google Scholar 

  7. 7

    Wilson, M. Structure and phase stability of novel 'twisted' crystal structures in carbon nanotubes. Chem. Phys. Lett. 366, 504–509 (2002).

    CAS  Article  Google Scholar 

  8. 8

    Hodak, M. & Girifalco, L.A. Ordered phases of fullerene molecules formed inside carbon nanotubes. Phys. Rev. B 67, 075419 (2003).

    Article  Google Scholar 

  9. 9

    Kane, C.L. & Mele, E.J. Size, shape, and low energy electronic structure of carbon nanotubes. Phys. Rev. Lett. 78, 1932–1935 (1997).

    CAS  Article  Google Scholar 

  10. 10

    Journet, C. et al. Large-scale production of single-walled carbon nanotubes by the electric-arc technique. Nature 388, 756–757 (1997).

    CAS  Article  Google Scholar 

  11. 11

    Brown, G. et al. High yield incorporation and washing properties of halides incorporated into single walled carbon nanotubes. Appl. Phys. A 76, 457–462 (2003).

    CAS  Article  Google Scholar 

  12. 12

    Hutchison, J.L., Doole, R.C., Dunin-Borkowski, R.E., Sloan, J. & Green, M.L.H. The development and assessment of a high performance field emission gun analytical HREM for materials science applications. JEOL News 34E, 10–15 (1999).

    Google Scholar 

  13. 13

    Meyer, R.R., Kirkland A.I. & Saxton, W.O. A new method for the determination of the wave aberration function for high resolution TEM: 1. Measurement of the symmetric aberrations. Ultramicroscopy 92, 89–109 (2002).

    CAS  Article  Google Scholar 

  14. 14

    Kirkland, A.I., Saxton, W.O., Chand, G. Kawasaki, M. & Tsuno, K. Super-resolution by aperture synthesis: tilt series reconstruction in CTEM. Ultramicroscopy 57, 355–374 (1995).

    CAS  Article  Google Scholar 

  15. 15

    Kirkland, A.I., Saxton, W.O. & Chand, G. Multiple beam tilt microscopy for super resolved imaging. J. Electron Microsc. 1, 11–22 (1997).

    Article  Google Scholar 

  16. 16

    Coene, W., Janssen, G., op de Beeck, M. & van Dyck, D. Phase retrieval through focus variation for ultra-resolution in field-emission transmission electron microscopy. Phys. Rev. Lett. 69, 3743–3746 (1992).

    CAS  Article  Google Scholar 

  17. 17

    van Dyck, D., op de Beeck, M. & Coene, W. A new approach to object wave-function restoration in electron microscopy. Optik 93, 103–107 (1993).

    Google Scholar 

  18. 18

    Pasternak, M.P. & Taylor, R.D. Pressure-induced metallization and electronic-magnetic properties of some Mott insulators. Phys. Status Solidi 223, 65–74 (2001).

    CAS  Article  Google Scholar 

  19. 19

    Kuindersma, S.R., Sanchez, J.P. & Haas, C. Magnetic and structural investigations on nickelous iodide and cobaltous iodide. Physica B 111, 231–248 (1981).

    CAS  Article  Google Scholar 

  20. 20

    Cowley, J.M. & Moodie, A.F. The scattering of electrons by atoms and crystals. Acta. Cryst. 10, 609–619 (1957).

    CAS  Article  Google Scholar 

  21. 21

    Meyer, R.R., Kirkland, A.I., Dunin-Borkowski, R.E. & Hutchison, J.L. Experimental characterisation of CCD cameras for HREM at 300kV. Ultramicroscopy 85, 9–13 (2000).

    CAS  Article  Google Scholar 

Download references

Acknowledgements

We acknowledge financial support from EPSRC, The Royal Society and the Leverhulme Trust.

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Correspondence to Jeremy Sloan or Angus I. Kirkland.

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Philp, E., Sloan, J., Kirkland, A. et al. An encapsulated helical one-dimensional cobalt iodide nanostructure. Nature Mater 2, 788–791 (2003). https://doi.org/10.1038/nmat1020

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